Fix: Set ApplicationName correctly when client is instantiated

src/__tests__/client.spec.ts

@@ -1,11 +1,54 @@
 import Client from "../client";
 
 describe("API Client", function (): void {
-    test("should be able to make a request using basic auth", async function (): Promise<void> {
-        new Client({
-            username: process.env.ADYEN_USER!,
-            password: process.env.ADYEN_PASSWORD!,
-            environment: "TEST"
-        });
+  test("should be able to make a request using basic auth", async function (): Promise<void> {
+    new Client({
+        username: process.env.ADYEN_USER!,
+        password: process.env.ADYEN_PASSWORD!,
+        environment: "TEST"
     });
+  });
+
+  test("should create client with API key", () => {
+    const client = new Client({
+      apiKey: "ADYEN_API_KEY",
+      environment: "TEST"
+    });
+
+    expect(client.config.apiKey).toBe("ADYEN_API_KEY");
+    expect(client.config.environment).toBe("TEST");
+    expect(client.config.marketPayEndpoint).toBe(Client.MARKETPAY_ENDPOINT_TEST);
+  });
+
+  test("should create client with basic auth credentials", () => {
+    const client = new Client({
+      username: "username",
+      password: "password",
+      environment: "TEST"
+    });
+
+    expect(client.config.username).toBe("username");
+    expect(client.config.password).toBe("password");
+    expect(client.config.environment).toBe("TEST");
+  });
+
+  test("should set application name", () => {
+    const client = new Client({
+      apiKey: "ADYEN_API_KEY",
+      environment: "TEST",
+      applicationName: "my_application_name"
+    });
+
+    expect(client.config.applicationName).toBe("my_application_name");
+  });
+
+  test("should set timeout", () => {
+    const client = new Client({
+      apiKey: "ADYEN_API_KEY",
+      environment: "TEST"
+    });
+
+    client.setTimeouts(30000);
+    expect(client.config.connectionTimeoutMillis).toBe(30000);
+  });
 });

src/client.ts

@@ -59,16 +59,17 @@ class Client {
             if (options.username && options.password) {
                 this.config.username = options.username;
                 this.config.password = options.password;
-                if(options.applicationName) {
-                    this.config.applicationName = options.applicationName;
-                }
             }
 
             if (options.apiKey) {
                 this.config.apiKey = options.apiKey;
             }
         }
 
+        if(options.applicationName) {
+            this.config.applicationName = options.applicationName;
+        }
+
         if (options.httpClient) {
             this._httpClient = options.httpClient;
         }